Level, 2 wins each over 4 singles meetings since 2023. Last meeting on 22/03/2025 at W50 Kofu.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 22/03/2025 | W50 Kofu | Semi-final | hard | Kaji | 5-7 6-2 6-3 |
| 11/01/2024 | W50 Nonthaburi | Round 2 | hard | Saito | 7-5 3-6 5-0 |
| 10/05/2023 | W60 Fukuoka | Round 1 | carpet | Saito | 5-7 6-7(0) |
| 11/04/2023 | W25 Osaka | Round 1 | hard | Kaji | 6-0 6-3 |
| hard | Kaji 2 - 1 Saito |
| carpet | Kaji 0 - 1 Saito |
| 2025 | Kaji 1 - 0 Saito |
| 2024 | Kaji 0 - 1 Saito |
| 2023 | Kaji 1 - 1 Saito |
167 wins, 137 losses since 2021 (54.9%).
Last matches: D V D V D
124 wins, 90 losses since 2021 (57.9%).
Last matches: D D V V D
Level, 2 wins each over 4 singles meetings since 2023.
On 22/03/2025, at W50 Kofu (Semi-final): Haruka Kaji won 5-7 6-2 6-3.